This game is a lot of work to get playing great . There are a lot of optos , diverters, and everything needs to be all in harmony to work , but once you do , this game is awesome !! I’ve shopped and worked on at least 4 of these and I like it more and more each time I have one through the shop . Buy a new trough board and save yourself some time . Also go to the fan thread and do all the little tweaks they suggest . I would also buy a new set of wiring harnesses as aback up for the two launch mechs , these tend to go bad over the years as well did to the back and forth movement and old stiff wires .